Montana General Knowledge CDL Prep Test (MT) 4

5 out of 5 (42 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you gearing up to ace your Montana CDL (Commercial Driver's License) test? You're in the right place! Our fourth Montana CDL practice test is designed to not only test but also strengthen your understanding of essential driving knowledge. With 20 questions to tackle, each one carefully crafted, this general knowledge prep test mimics the format and challenge of the actual Montana CDL exam. Remember, scoring at least 16 out of 20 is your goal to pass. What sets this Montana CDL prep test apart is its realistic approach. The DMV questions aren't just theoretical; they place you in the driver's seat, facing situations you'll encounter on Montana roads. This practical angle ensures that you're not just memorizing facts but truly understanding and applying them. Flexibility is key to effective learning. That's why our practice sessions fare customizable. Struggling with a particular topic? Focus your study there. Want to improve your score? Retake the test as many times as you need. Plus, you can do this at your convenience, ensuring your preparation fits into your busy schedule seamlessly. After completing this Montana CDL general knowledge test, you'll receive a detailed summary of your performance. This is not just about seeing your score; it's about learning from it. The summary will highlight any permit test questions you missed and provide the correct answers. This feedback is crucial for turning mistakes into learning opportunities, helping you to improve with each practice session. Remember, mastering the content of this Montana CDL prep test is more than just a step towards getting your CDL in 2026 - it's about becoming a safer, more knowledgeable driver on Montana's roads. So, let's get you prepared and confident for your CDL exam!
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Sample Montana CDL Test Questions - General Knowledge

Question 1

Which statement correctly distinguishes gross combination weight (GCW) from gross combination weight rating (GCWR)?

  1. A GCW is a manufacturer’s rating, while GCWR is the actual weight of one vehicle
  2. B GCW includes only the power unit, while GCWR includes only the trailers
  3. C GCW is the combination’s actual total weight, while GCWR is the applicable rated value for the combination
  4. D The two terms are interchangeable

Correct answer: C – GCW is the combination’s actual total weight, while GCWR is the applicable rated value for the combination

GCW describes the actual combined weight of the power unit, towed units, and their loads. Under the federal CDL definition, GCWR is the greater of the manufacturer’s displayed power-unit rating or the applicable sum of the power unit’s and towed units’ GVWRs or GVWs. Actual weight and rated weight are not interchangeable.

Source: Montana Commercial Driver License Manual — § 3.2.1, “Definitions You Should Know”, 49 CFR § 383.5 — Definitions: Gross Combination Weight Rating

Question 2

A commercial driver should use low-beam headlights at all times, even when high beams would be safe and lawful.

  1. A True
  2. B False

Correct answer: B – False

High beams should be used when they are safe and lawful because they provide greater visibility ahead. Montana law requires a non-glaring beam within 1,000 feet of an oncoming vehicle and requires drivers following another vehicle within 500 feet to use a beam other than the uppermost distribution. Low beams are also appropriate in fog and other conditions where high beams reduce visibility.

Source: Montana Commercial Driver License Manual — § 2.11.5, “Night Driving Procedures”, MCA § 61-9-221(1)–(2) — Use of Multiple-Beam Road-Lighting Equipment

Question 3

Before taking a modern truck down a long, steep grade, you should generally select:

  1. A A lower gear than the truck might need to climb the same grade
  2. B The same gear used to climb the grade in every situation
  3. C A higher gear than the truck might need to climb the grade
  4. D Any gear, provided the service brakes are applied continuously

Correct answer: A – A lower gear than the truck might need to climb the same grade

Modern trucks may climb grades in relatively high gears because they have powerful engines and low-friction, streamlined designs. Those same characteristics provide less resistance while descending, so a lower gear may be necessary. Select the proper low gear before starting downhill and use engine braking as the main means of controlling speed.

Source: Montana Commercial Driver License Manual 2026 — § 2.16.2, “Select the Right Gear before Starting Down the Grade”

Question 4

Which tire practice is correct when operating in very hot weather?

  1. A Inspect the tires more frequently than usual
  2. B Release air from tires as their pressure rises
  3. C Continue driving when a tire is too hot to touch
  4. D Assume recapped tires resist heat better than new tires

Correct answer: A – Inspect the tires more frequently than usual

In very hot weather, inspect tire mounting and air pressure every two hours or every 100 miles. Do not release air merely because pressure increased with temperature; the tire could become underinflated after cooling. If a tire is too hot to touch, remain stopped until it cools because continued operation could cause a blowout or fire.

Source: Montana Commercial Driver License Manual 2026 — § 2.14.1, “Vehicle Checks”

Question 5

A yellow diamond sign shows a short road joining the main roadway from the right. What does it warn you about?

This sign warns drivers to _____________.
  1. A A one-way street begins to the right
  2. B Traffic approaches only from the left
  3. C A side road enters from the right
  4. D A reverse turn begins ahead

Correct answer: C – A side road enters from the right

This is a side-road intersection warning sign. It alerts drivers that another roadway joins from the right, where vehicles may enter or cross the main roadway. On a Montana roadway, recognize the symbol early and be prepared for traffic near the intersection.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways, 11th ed. — Part 2, Ch. 2C, “Intersection Warning Signs”

Question 6

Before going beneath a tractor-trailer to inspect the fifth-wheel coupling, why should you remove the ignition key and keep it with you?

  1. A To protect the key from the weather
  2. B To prevent someone else from starting or moving the truck
  3. C To unlock the fifth-wheel jaws
  4. D To reset the vehicle’s electrical system

Correct answer: B – To prevent someone else from starting or moving the truck

Before inspecting the coupling from underneath, place the transmission in neutral, apply the parking brakes, shut off the engine, and take the key. Keeping the key with you prevents another person from starting or moving the truck while you are in a dangerous position beneath it.

Source: Montana Commercial Driver License Manual 2026 — § 6.4, “Coupling Tractor-Semitrailers,” Step 12, “Secure Vehicle”

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